Ox Alpha vs Claude Opus 5 (Fast): side-by-side summary

Ox Alpha and Claude Opus 5 (Fast) are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Ox Alpha, from Stealth, has a 1,048,576-token context window and is free to use on OpenRouter.

Claude Opus 5 (Fast), from Anthropic, has a 1,000,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.

Context window

• Ox Alpha: 1,048,576 tokens
• Claude Opus 5 (Fast): 1,000,000 tokens

Price

• Ox Alpha: Free
• Claude Opus 5 (Fast): $10/M tokens input, $50/M tokens output

Provided by

• Ox Alpha: Stealth
• Claude Opus 5 (Fast): Anthropic

• Ox Alpha model details, providers and pricing
• Claude Opus 5 (Fast) model details, providers and pricing